Terminal connection for electrodes



April 27 1926. 1,582,691

E. J. REICH TERMINAL CONNECTION FOR ELECTRODES Filed July 50, 1923INVENTOR 5m J fiwg A ATTORNEY Patented n- 27; 1926.

' UNITED STATES PATENT OFFICE.

EDWIN .1. Rmcn, or BROOKLYN, NEW Ydnx, AssIeNon roman MANHATTAN ELEC-rnrcensngrng comralw, or nnw y onx n. Y Ae CORPORATION DF MASSA-GHUSET'I'S.

- This invention relates to newand ifseful' improveme ntsinf terminalconnections for electrodes.

The object of the present invention is to LMprovide-a terminalconnection which is adapted to make'good contact with the carbon orother electrode, which may be readily applied preferably by means ofautomatic machinery,,and which will be firmly held in place while thebattery is in use.

With these objects in view I provide a structure to be hereinafterdisclosed more in detail and various inventive features of an annular Y7 fits .overa squared enlargement 9 on the which are defined intheappended claims.

The invention is illustrated in the drawing, showing a dry cell carbonelectrode or pencil partly in section to display the construction of thepreferred embodiment of the present invention. f The upper end of acarbon electrode 1 terminates in a tapering bead 2 and is longitudinallyperforated at 3 to a slight depth. A dowel 4 is forced with itslongitudinally corrugated shankwithin the hole 3 and into firm contactwith the carbon. The downward movement of the dowel 4-. is limited byrojection 5 provided thereon or fastened t ereto by any suitable means.The dowel may be forced into the carbon until the shoulder .5 engagesthe top' of the carbon pencil 1. \I

The upper part of the dowel is screwthreaded at .6 to receive the nut bymeans of which the wires are usually attached to vided with a squarehole in its center which dowel provided between the screw-threadedportion 6 and the shoulder 5. The cap 7 ,will rest on top of theshoulder 5. The

height of this squared portion ;.9l is about TERMINAL CONNECTION FORELECTRODES.

- Application filed July so, 1923. Serial No. 654,824.

twice that of the thickness of cap 7, and after the cap is put in placewith the square hole over 9, a blow is delivered on the shout der formedby the squared portion 9 in the direction of the axis of the dowel fordriving the dowel into the carbonlpencil. Due

a bead 10 by means of which the cap 7 will be firmly held in place. '-'Ihe-corrugated petticoat 8 of the cap is forced over thebead 2 on theupper end-of the carbon pencil by any suitable means, such as isemployed in bottle capping machinery.

The corrugated shank of the dowel 4 provides a fair contact with thecarbon and is fairly effective in counteracting the loosening of thedowel when the binding screw is tightened over the screw threaded end 6.However, this in itself is insuificient to withstand long and hardusage. The cap 7 with itsflu'ted petticoat provides a further means formakingcontact with the carbon. Due to the fact that these carbonuencils' can practically not be made uniformly round, round caps do notmake as good contact as corrugated ca swhich are forced "firmly to graspthe car on at the indentations. The cap 7 holds the dowel in placethrough the agency of the squared portion 9, and the enlargement betweenthebead 2 of the carbon pencil and the petticoat 8 of the cap will alsoaid in preventing the turning movement of the dowel. The dowel willresist l-ongitudt nal movement due to friction with the carbon penciland also due to the fact that it is held down by means of the capengaging the shoulder 5.

What I claim is:

1. In combination, an electrode, a dowel forced into the end of saidelectrode, and a cap forced over the end of said electrode and holdingthe dowel from rotary and vertical displacements. the connector. A crowncap having theusual fluted or corrugated petticoat 8'is 'pro-'' 2. Incombination, a carbon electrode, a

dowel having a corrugatedshank forced intd the end of said electrode,and a crown cap forced over the end of the electrode and holding saiddowel displacements.

3. In comb ation, a. carbon electrode the end of which is tapered andperforated-to a um from rotary and vertical 7 slight depth, a dowelhaving a corrugated shank projecting within said perforation, a shoulderon said dowel to limit its downward movement, a squared enlargement onsaid dowel above said shoulder, a cap having a fluted Petticoat engagingthe tapered end of said electrode, and a squared perforation engagingsaid-enlargement, and a head around the perforation in said cap forminga homogeneous mass with said enlargement. 10

In witness whereof, I hereunto subscribe my name this 23rd day of July1923.

EDWIN J. REICH.

